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Last updated on October 3, 2026
The best automatic litter box for you depends less on the brand and more on how it cleans. A rotating globe, an open tray and a machine plumbed into your drain all handle waste differently, and each one suits a different cat and home.
This guide picks one strong box for each of five designs, explains who each design suits, and covers what to check before you buy.
For most homes, the best automatic litter box is the Litter-Robot 4. It combines a large body of owner feedback with app tracking and a sealed waste drawer. If your cat won’t step into an enclosed box, or you never want to handle waste at all, one of the other designs below fits better.
Quick Picks
Best overall: Litter-Robot 4. An enclosed globe with a sealed waste drawer.
Best compact drum: HHOLOVE Self Cleaning Litter Box. The rotating design in a smaller footprint.
Best open-top: Thereye Open-Top Self Cleaning Litter Box. For cats that refuse a hood.
Best plumbed-in: CatGenie Whoosh. Sends waste to a drain, so there’s no drawer to empty.
Best crystal tray: PetSafe ScoopFree Crystal Classic. A rake and a disposable tray, with no app to set up.
Which Automatic Litter Box Design Fits You?
Enclosed globe. The whole chamber rotates to sift clumps into a sealed drawer underneath. It needs the most floor space, and in return the enclosed design can help contain odor and scatter, although performance varies by model.
Compact drum. A compact drum uses the same rotating idea in a smaller shell. Check its interior space and weight range against your cat; the advantage is fitting the automatic mechanism into a smaller footprint.
Open-top. There’s no hood over the litter bed, so the cat can see around while using it. Odor can escape more easily than with a hood, but an open design may suit a cat that avoids enclosed boxes.
Plumbed-in. The box connects to a water line and a drain and sends waste away after each use. It has to sit near plumbing, and in return there’s no drawer to empty.
Crystal tray with rake. A rake pushes solid waste into a covered bin while crystals absorb urine. The standard setup uses a disposable tray, although PetSafe also sells reusable trays. Unlike the clumping-litter designs above, the system uses crystal litter. Our scoop free litter box guide covers whether that system suits you.
| Box | Design | Best For | Watch Out For |
|---|---|---|---|
| Litter-Robot 4 | Enclosed globe | Most homes with the floor space | Large footprint |
| HHOLOVE | Compact drum | Smaller rooms | Listed upper limit about 20 lb |
| Thereye | Open-top | Cats that avoid enclosed boxes | Less odor containment |
| CatGenie Whoosh | Plumbed-in | Never handling waste | Needs a water line and drain |
| ScoopFree Crystal Classic | Crystal tray and rake | The simplest setup | Crystal litter system only |
Litter-Robot 4 by Whisker
Why It Stands Out
Owners consistently report strong odor control, with waste dropping into a sealed drawer below the globe. It’s also quiet. One owner on their third Litter-Robot says you have to stand right beside it to hear it turn.
You can adjust the wait before each cycle. Its most critical reviewer says raising the delay to 15 minutes helped a lot. Whisker describes it as suitable for cats from 3 to 25 lb and up to four cats.
The app logs each cat’s weight and visits. One owner with two brothers of very different sizes says the readings came close to their real weights. The app only records numbers, so take any concern about your cat straight to your vet.
Possible Downsides
It’s big, so measure your space before ordering. Some owners say dust on the sensors causes false readings until they wipe them clean.
Best For
Most homes that have the room, including large cats that fit its interior. Our Litter-Robot 4 review goes deeper.
HHOLOVE Self Cleaning Litter Box
Why It Stands Out
At about 21.5 inches square, it takes up noticeably less floor space than the Litter-Robot 4. Quiet operation is its most reported strength, and owners of easily startled cats say it doesn’t bother them.
One owner tested the safety stop over several days. They report the drum stopped as soon as a cat touched it, then restarted about a minute after the cat left. HHOLOVE lists clumping and tofu litter as compatible.
It arrives assembled, which keeps the physical setup simple.
Possible Downsides
HHOLOVE lists a roughly 20 lb upper limit. For a cat above that, choose a model whose listed range and interior dimensions fit your cat. Owners also say the manual is poor, though one found the box easy enough to figure out without it.
It’s also newer than the other picks, so there’s less long-term owner feedback available.
Best For
Apartments and smaller rooms with cats under 20 lb.
Thereye Open-Top Self Cleaning Litter Box
Why It Stands Out
One owner’s cat refused to use a Litter-Robot but uses this open box consistently. That’s the problem this design exists to solve.
Two reviewers say the entry step catches a good amount of litter from paws. A cover over the buttons keeps urine away from the controls. Reviewers, including the critical ones, call it quiet.
Possible Downsides
An open top doesn’t hold in odor the way an enclosed globe does. Reviewers also disagree on how well the step keeps litter in. Check Thereye’s listed weight range against your cat before ordering.
Best For
Cats that won’t use an enclosed automatic box.
CatGenie Whoosh
Why It Stands Out
There’s no drawer or bag at all. CatGenie says the Whoosh grinds waste and used litter into liquid and sends it into a toilet or laundry drain you connect it to.
Long-time CatGenie owners who upgraded say it runs faster and quieter, and tracks less, than earlier models. One reports fewer clogs. The listing says the app has no subscription.
Possible Downsides
It needs a water supply and a drain within reach, which limits where it can go. It also runs on CatGenie’s own clumping litter and sanitizer cartridges, so you’re tied to their supplies.
Best For
Homes with a laundry room or bathroom spot near a drain, where handling waste is the chore you most want gone. Our CatGenie review compares it with the A.I.
PetSafe ScoopFree Crystal Classic
Why It Stands Out
It arrives ready to use. A rake sweeps solid waste into a covered compartment, crystals absorb urine, and you lift out and toss the sealed tray. There’s no scooping or scraping.
Reviewers report strong odor control and low dust. With no app or Wi-Fi, there’s nothing to pair or troubleshoot.
Possible Downsides
It uses the ScoopFree crystal-litter system rather than regular clumping litter. The included tray is disposable, although PetSafe also sells reusable alternatives.
Best For
Owners who want the simplest automatic box. If you want an app or clumping litter, our PetSafe ScoopFree review compares the other models.
Before You Buy
Check the maker’s weight and cat-count guidance, then compare the opening and interior dimensions with your cat’s size. That quick check helps you choose a box with enough room for your cat.
Add up the ongoing supplies too. Some boxes take any trash bag, while others need their own bags, trays, litter or cartridges.
Each machine also lists the litter it works with, so follow the manual. Our guide to the best cat litter for automatic litter boxes goes model by model. Once it’s home, see how to get your cat to use an automatic litter box and how to clean an automatic litter box.
Got several cats, or shopping on price? See our best automatic litter box for multiple cats and our best budget automatic litter box roundup.
Frequently Asked Questions
Is the Litter-Robot 5 better than the Litter-Robot 4?
Whisker says the Litter-Robot 5 adds WasteID, which distinguishes urine from stool, and supports up to five cats. We kept the Litter-Robot 4 as our pick because it has a much larger body of long-term owner feedback.
Can kittens use an automatic litter box?
Check the manufacturer’s minimum before using any automatic mode. Whisker, for example, says kittens at least 3 lb can use the Litter-Robot 4 automatically. Below that, it tells owners to keep automatic cycling off and run it semi-automatically. Other models have their own requirements.
How many cats can share one automatic litter box?
Follow the maker’s limit. Whisker says the Litter-Robot 4 supports up to four cats. Our multi-cat roundup covers boxes with stronger multi-cat evidence.
Are automatic litter boxes worth it?
Yes, if daily scooping is the chore you most want to reduce. An automatic box handles routine waste removal for you, so you mainly manage the drawer or tray, supplies and periodic cleaning instead.
